// 下载按钮旋转
$('.mxd_download').addClass("item");
$('.mxd_download').mouseenter(function () {

    if ($(this).hasClass("item")) {

        $(this).css("transition", "transform 0.2s ");
        $(this).css("transformOrigin", "center center");
        $(this).css("transform", "rotateY(90deg)")
        setTimeout(function () {
            $('.mxd_download').removeClass("item");
            $('.mxd_download').css("transform", "rotateY(-90)");
            $('.mxd_download').css("transition", "transform 0.2s ");
            $('.mxd_download').css("transformOrigin", "center center");
            $('.mxd_download').css("transform", "rotateY(0deg)")
        }, 200)
        setTimeout(function () {
            $('.mxd_download').css("transition", "transform 0.2s ");
            $('.mxd_download').css("transformOrigin", "center center");
            $('.mxd_download').css("transform", "rotateY(50deg)")
        }, 400)
        setTimeout(function () {
            $('.mxd_download').css("transition", "transform 0.2s ");
            $('.mxd_download').css("transformOrigin", "center center");
            $('.mxd_download').css("transform", "rotateY(-20deg)")
        }, 600)
        setTimeout(function () {
            $('.mxd_download').css("transition", "transform 0.2s ");
            $('.mxd_download').css("transformOrigin", "center center");
            $('.mxd_download').css("transform", "rotateY(0deg)");
            $('.mxd_download').addClass("item");
        }, 800)
    }
})